changeset 1283:24128c2ffa87

6921339: backout 6917766 Reviewed-by: mr
author twisti
date Fri, 29 Jan 2010 08:33:24 -0800
parents ba263cfb7611
children 5f24d0319e54
files src/cpu/sparc/vm/c1_LIRAssembler_sparc.cpp src/cpu/sparc/vm/frame_sparc.cpp src/cpu/x86/vm/c1_LIRAssembler_x86.cpp src/cpu/x86/vm/frame_x86.cpp src/cpu/x86/vm/frame_x86.inline.hpp src/share/vm/asm/codeBuffer.hpp src/share/vm/c1/c1_Compilation.cpp src/share/vm/c1/c1_LIRAssembler.hpp src/share/vm/code/nmethod.cpp src/share/vm/code/nmethod.hpp src/share/vm/opto/output.cpp src/share/vm/runtime/deoptimization.cpp src/share/vm/runtime/frame.cpp src/share/vm/runtime/frame.hpp src/share/vm/runtime/sharedRuntime.cpp
diffstat 15 files changed, 134 insertions(+), 255 deletions(-) [+]
line wrap: on
line diff
--- a/src/cpu/sparc/vm/c1_LIRAssembler_sparc.cpp	Fri Jan 29 12:13:05 2010 +0100
+++ b/src/cpu/sparc/vm/c1_LIRAssembler_sparc.cpp	Fri Jan 29 08:33:24 2010 -0800
@@ -1,5 +1,5 @@
 /*
- * Copyright 2000-2010 Sun Microsystems, Inc.  All Rights Reserved.
+ * Copyright 2000-2009 Sun Microsystems, Inc.  All Rights Reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -357,7 +357,7 @@
 }
 
 
-int LIR_Assembler::emit_exception_handler() {
+void LIR_Assembler::emit_exception_handler() {
   // if the last instruction is a call (typically to do a throw which
   // is coming at the end after block reordering) the return address
   // must still point into the code area in order to avoid assertion
@@ -373,10 +373,13 @@
   if (handler_base == NULL) {
     // not enough space left for the handler
     bailout("exception handler overflow");
-    return -1;
+    return;
   }
-
+#ifdef ASSERT
   int offset = code_offset();
+#endif // ASSERT
+  compilation()->offsets()->set_value(CodeOffsets::Exceptions, code_offset());
+
 
   if (compilation()->has_exception_handlers() || compilation()->env()->jvmti_can_post_exceptions()) {
     __ call(Runtime1::entry_for(Runtime1::handle_exception_id), relocInfo::runtime_call_type);
@@ -387,13 +390,11 @@
   __ delayed()->nop();
   debug_only(__ stop("should have gone to the caller");)
   assert(code_offset() - offset <= exception_handler_size, "overflow");
+
   __ end_a_stub();
-
-  return offset;
 }
 
-
-int LIR_Assembler::emit_deopt_handler() {
+void LIR_Assembler::emit_deopt_handler() {
   // if the last instruction is a call (typically to do a throw which
   // is coming at the end after block reordering) the return address
   // must still point into the code area in order to avoid assertion
@@ -407,18 +408,23 @@
   if (handler_base == NULL) {
     // not enough space left for the handler
     bailout("deopt handler overflow");
-    return -1;
+    return;
   }
-
+#ifdef ASSERT
   int offset = code_offset();
+#endif // ASSERT
+  compilation()->offsets()->set_value(CodeOffsets::Deopt, code_offset());
+
   AddressLiteral deopt_blob(SharedRuntime::deopt_blob()->unpack());
+
   __ JUMP(deopt_blob, G3_scratch, 0); // sethi;jmp
   __ delayed()->nop();
+
   assert(code_offset() - offset <= deopt_handler_size, "overflow");
+
   debug_only(__ stop("should have gone to the caller");)
+
   __ end_a_stub();
-
-  return offset;
 }
 
 
--- a/src/cpu/sparc/vm/frame_sparc.cpp	Fri Jan 29 12:13:05 2010 +0100
+++ b/src/cpu/sparc/vm/frame_sparc.cpp	Fri Jan 29 08:33:24 2010 -0800
@@ -1,5 +1,5 @@
 /*
- * Copyright 1997-2010 Sun Microsystems, Inc.  All Rights Reserved.
+ * Copyright 1997-2008 Sun Microsystems, Inc.  All Rights Reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -366,9 +366,8 @@
   // as get_original_pc() needs correct value for unextended_sp()
   if (_pc != NULL) {
     _cb = CodeCache::find_blob(_pc);
-    address original_pc = nmethod::get_deopt_original_pc(this);
-    if (original_pc != NULL) {
-      _pc = original_pc;
+    if (_cb != NULL && _cb->is_nmethod() && ((nmethod*)_cb)->is_deopt_pc(_pc)) {
+      _pc = ((nmethod*)_cb)->get_original_pc(this);
       _deopt_state = is_deoptimized;
     } else {
       _deopt_state = not_deoptimized;
@@ -520,9 +519,9 @@
   _cb = CodeCache::find_blob(pc);
   *O7_addr() = pc - pc_return_offset;
   _cb = CodeCache::find_blob(_pc);
-  address original_pc = nmethod::get_deopt_original_pc(this);
-  if (original_pc != NULL) {
-    assert(original_pc == _pc, "expected original to be stored before patching");
+  if (_cb != NULL && _cb->is_nmethod() && ((nmethod*)_cb)->is_deopt_pc(_pc)) {
+    address orig = ((nmethod*)_cb)->get_original_pc(this);
+    assert(orig == _pc, "expected original to be stored before patching");
     _deopt_state = is_deoptimized;
   } else {
     _deopt_state = not_deoptimized;
--- a/src/cpu/x86/vm/c1_LIRAssembler_x86.cpp	Fri Jan 29 12:13:05 2010 +0100
+++ b/src/cpu/x86/vm/c1_LIRAssembler_x86.cpp	Fri Jan 29 08:33:24 2010 -0800
@@ -1,5 +1,5 @@
 /*
- * Copyright 2000-2010 Sun Microsystems, Inc.  All Rights Reserved.
+ * Copyright 2000-2009 Sun Microsystems, Inc.  All Rights Reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -418,12 +418,13 @@
 }
 
 
-int LIR_Assembler::emit_exception_handler() {
+void LIR_Assembler::emit_exception_handler() {
   // if the last instruction is a call (typically to do a throw which
   // is coming at the end after block reordering) the return address
   // must still point into the code area in order to avoid assertion
   // failures when searching for the corresponding bci => add a nop
   // (was bug 5/14/1999 - gri)
+
   __ nop();
 
   // generate code for exception handler
@@ -431,10 +432,13 @@
   if (handler_base == NULL) {
     // not enough space left for the handler
     bailout("exception handler overflow");
-    return -1;
+    return;
   }
-
+#ifdef ASSERT
   int offset = code_offset();
+#endif // ASSERT
+
+  compilation()->offsets()->set_value(CodeOffsets::Exceptions, code_offset());
 
   // if the method does not have an exception handler, then there is
   // no reason to search for one
@@ -470,19 +474,19 @@
   // unwind activation and forward exception to caller
   // rax,: exception
   __ jump(RuntimeAddress(Runtime1::entry_for(Runtime1::unwind_exception_id)));
+
   assert(code_offset() - offset <= exception_handler_size, "overflow");
+
   __ end_a_stub();
-
-  return offset;
 }
 
-
-int LIR_Assembler::emit_deopt_handler() {
+void LIR_Assembler::emit_deopt_handler() {
   // if the last instruction is a call (typically to do a throw which
   // is coming at the end after block reordering) the return address
   // must still point into the code area in order to avoid assertion
   // failures when searching for the corresponding bci => add a nop
   // (was bug 5/14/1999 - gri)
+
   __ nop();
 
   // generate code for exception handler
@@ -490,17 +494,23 @@
   if (handler_base == NULL) {
     // not enough space left for the handler
     bailout("deopt handler overflow");
-    return -1;
+    return;
   }
-
+#ifdef ASSERT
   int offset = code_offset();
+#endif // ASSERT
+
+  compilation()->offsets()->set_value(CodeOffsets::Deopt, code_offset());
+
   InternalAddress here(__ pc());
   __ pushptr(here.addr());
+
   __ jump(RuntimeAddress(SharedRuntime::deopt_blob()->unpack()));
+
   assert(code_offset() - offset <= deopt_handler_size, "overflow");
+
   __ end_a_stub();
 
-  return offset;
 }
 
 
--- a/src/cpu/x86/vm/frame_x86.cpp	Fri Jan 29 12:13:05 2010 +0100
+++ b/src/cpu/x86/vm/frame_x86.cpp	Fri Jan 29 08:33:24 2010 -0800
@@ -1,5 +1,5 @@
 /*
- * Copyright 1997-2010 Sun Microsystems, Inc.  All Rights Reserved.
+ * Copyright 1997-2009 Sun Microsystems, Inc.  All Rights Reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -222,9 +222,9 @@
   }
   ((address *)sp())[-1] = pc;
   _cb = CodeCache::find_blob(pc);
-  address original_pc = nmethod::get_deopt_original_pc(this);
-  if (original_pc != NULL) {
-    assert(original_pc == _pc, "expected original PC to be stored before patching");
+  if (_cb != NULL && _cb->is_nmethod() && ((nmethod*)_cb)->is_deopt_pc(_pc)) {
+    address orig = (((nmethod*)_cb)->get_original_pc(this));
+    assert(orig == _pc, "expected original to be stored before patching");
     _deopt_state = is_deoptimized;
     // leave _pc as is
   } else {
@@ -323,39 +323,19 @@
   return fr;
 }
 
-
-//------------------------------------------------------------------------------
-// frame::sender_for_interpreter_frame
 frame frame::sender_for_interpreter_frame(RegisterMap* map) const {
-  // SP is the raw SP from the sender after adapter or interpreter
-  // extension.
-  intptr_t* sender_sp = this->sender_sp();
+  // sp is the raw sp from the sender after adapter or interpreter extension
+  intptr_t* sp = (intptr_t*) addr_at(sender_sp_offset);
 
   // This is the sp before any possible extension (adapter/locals).
   intptr_t* unextended_sp = interpreter_frame_sender_sp();
 
-  // Stored FP.
-  intptr_t* saved_fp = link();
-
   address sender_pc = this->sender_pc();
   CodeBlob* sender_cb = CodeCache::find_blob_unsafe(sender_pc);
   assert(sender_cb, "sanity");
   nmethod* sender_nm = sender_cb->as_nmethod_or_null();
-
-  if (sender_nm != NULL) {
-    // If the sender PC is a deoptimization point, get the original
-    // PC.  For MethodHandle call site the unextended_sp is stored in
-    // saved_fp.
-    if (sender_nm->is_deopt_mh_entry(sender_pc)) {
-      DEBUG_ONLY(verify_deopt_mh_original_pc(sender_nm, saved_fp));
-      unextended_sp = saved_fp;
-    }
-    else if (sender_nm->is_deopt_entry(sender_pc)) {
-      DEBUG_ONLY(verify_deopt_original_pc(sender_nm, unextended_sp));
-    }
-    else if (sender_nm->is_method_handle_return(sender_pc)) {
-      unextended_sp = saved_fp;
-    }
+  if (sender_nm != NULL && sender_nm->is_method_handle_return(sender_pc)) {
+    unextended_sp = (intptr_t*) at(link_offset);
   }
 
   // The interpreter and compiler(s) always save EBP/RBP in a known
@@ -379,51 +359,40 @@
     }
 #endif // AMD64
   }
-#endif // COMPILER2
-
-  return frame(sender_sp, unextended_sp, saved_fp, sender_pc);
+#endif /* COMPILER2 */
+  return frame(sp, unextended_sp, link(), sender_pc);
 }
 
 
-//------------------------------------------------------------------------------
-// frame::sender_for_compiled_frame
+//------------------------------sender_for_compiled_frame-----------------------
 frame frame::sender_for_compiled_frame(RegisterMap* map) const {
   assert(map != NULL, "map must be set");
+  const bool c1_compiled = _cb->is_compiled_by_c1();
 
   // frame owned by optimizing compiler
+  intptr_t* sender_sp = NULL;
+
   assert(_cb->frame_size() >= 0, "must have non-zero frame size");
-  intptr_t* sender_sp = unextended_sp() + _cb->frame_size();
-  intptr_t* unextended_sp = sender_sp;
+  sender_sp = unextended_sp() + _cb->frame_size();
 
   // On Intel the return_address is always the word on the stack
   address sender_pc = (address) *(sender_sp-1);
 
-  // This is the saved value of EBP which may or may not really be an FP.
-  // It is only an FP if the sender is an interpreter frame (or C1?).
-  intptr_t* saved_fp = (intptr_t*) *(sender_sp - frame::sender_sp_offset);
+  // This is the saved value of ebp which may or may not really be an fp.
+  // it is only an fp if the sender is an interpreter frame (or c1?)
 
-  // If we are returning to a compiled MethodHandle call site, the
-  // saved_fp will in fact be a saved value of the unextended SP.  The
-  // simplest way to tell whether we are returning to such a call site
-  // is as follows:
+  intptr_t *saved_fp = (intptr_t*)*(sender_sp - frame::sender_sp_offset);
+
+  intptr_t* unextended_sp = sender_sp;
+  // If we are returning to a compiled method handle call site,
+  // the saved_fp will in fact be a saved value of the unextended SP.
+  // The simplest way to tell whether we are returning to such a call
+  // site is as follows:
   CodeBlob* sender_cb = CodeCache::find_blob_unsafe(sender_pc);
   assert(sender_cb, "sanity");
   nmethod* sender_nm = sender_cb->as_nmethod_or_null();
-
-  if (sender_nm != NULL) {
-    // If the sender PC is a deoptimization point, get the original
-    // PC.  For MethodHandle call site the unextended_sp is stored in
-    // saved_fp.
-    if (sender_nm->is_deopt_mh_entry(sender_pc)) {
-      DEBUG_ONLY(verify_deopt_mh_original_pc(sender_nm, saved_fp));
-      unextended_sp = saved_fp;
-    }
-    else if (sender_nm->is_deopt_entry(sender_pc)) {
-      DEBUG_ONLY(verify_deopt_original_pc(sender_nm, unextended_sp));
-    }
-    else if (sender_nm->is_method_handle_return(sender_pc)) {
-      unextended_sp = saved_fp;
-    }
+  if (sender_nm != NULL && sender_nm->is_method_handle_return(sender_pc)) {
+    unextended_sp = saved_fp;
   }
 
   if (map->update_map()) {
@@ -434,7 +403,7 @@
     if (_cb->oop_maps() != NULL) {
       OopMapSet::update_register_map(this, map);
     }
-    // Since the prolog does the save and restore of EBP there is no oopmap
+    // Since the prolog does the save and restore of epb there is no oopmap
     // for it so we must fill in its location as if there was an oopmap entry
     // since if our caller was compiled code there could be live jvm state in it.
     map->set_location(rbp->as_VMReg(), (address) (sender_sp - frame::sender_sp_offset));
@@ -453,9 +422,6 @@
   return frame(sender_sp, unextended_sp, saved_fp, sender_pc);
 }
 
-
-//------------------------------------------------------------------------------
-// frame::sender
 frame frame::sender(RegisterMap* map) const {
   // Default is we done have to follow them. The sender_for_xxx will
   // update it accordingly
--- a/src/cpu/x86/vm/frame_x86.inline.hpp	Fri Jan 29 12:13:05 2010 +0100
+++ b/src/cpu/x86/vm/frame_x86.inline.hpp	Fri Jan 29 08:33:24 2010 -0800
@@ -1,5 +1,5 @@
 /*
- * Copyright 1997-2010 Sun Microsystems, Inc.  All Rights Reserved.
+ * Copyright 1997-2009 Sun Microsystems, Inc.  All Rights Reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -35,35 +35,32 @@
   _deopt_state = unknown;
 }
 
-inline frame::frame(intptr_t* sp, intptr_t* fp, address pc) {
+inline frame:: frame(intptr_t* sp, intptr_t* fp, address pc) {
   _sp = sp;
   _unextended_sp = sp;
   _fp = fp;
   _pc = pc;
   assert(pc != NULL, "no pc?");
   _cb = CodeCache::find_blob(pc);
-
-  address original_pc = nmethod::get_deopt_original_pc(this);
-  if (original_pc != NULL) {
-    _pc = original_pc;
+  _deopt_state = not_deoptimized;
+  if (_cb != NULL && _cb->is_nmethod() && ((nmethod*)_cb)->is_deopt_pc(_pc)) {
+    _pc = (((nmethod*)_cb)->get_original_pc(this));
     _deopt_state = is_deoptimized;
   } else {
     _deopt_state = not_deoptimized;
   }
 }
 
-inline frame::frame(intptr_t* sp, intptr_t* unextended_sp, intptr_t* fp, address pc) {
+inline frame:: frame(intptr_t* sp, intptr_t* unextended_sp, intptr_t* fp, address pc) {
   _sp = sp;
   _unextended_sp = unextended_sp;
   _fp = fp;
   _pc = pc;
   assert(pc != NULL, "no pc?");
   _cb = CodeCache::find_blob(pc);
-
-  address original_pc = nmethod::get_deopt_original_pc(this);
-  if (original_pc != NULL) {
-    _pc = original_pc;
-    assert(((nmethod*)_cb)->code_contains(_pc), "original PC must be in nmethod");
+  _deopt_state = not_deoptimized;
+  if (_cb != NULL && _cb->is_nmethod() && ((nmethod*)_cb)->is_deopt_pc(_pc)) {
+    _pc = (((nmethod*)_cb)->get_original_pc(this));
     _deopt_state = is_deoptimized;
   } else {
     _deopt_state = not_deoptimized;
@@ -89,9 +86,9 @@
 
   _cb = CodeCache::find_blob(_pc);
 
-  address original_pc = nmethod::get_deopt_original_pc(this);
-  if (original_pc != NULL) {
-    _pc = original_pc;
+  _deopt_state = not_deoptimized;
+  if (_cb != NULL && _cb->is_nmethod() && ((nmethod*)_cb)->is_deopt_pc(_pc)) {
+    _pc = (((nmethod*)_cb)->get_original_pc(this));
     _deopt_state = is_deoptimized;
   } else {
     _deopt_state = not_deoptimized;
--- a/src/share/vm/asm/codeBuffer.hpp	Fri Jan 29 12:13:05 2010 +0100
+++ b/src/share/vm/asm/codeBuffer.hpp	Fri Jan 29 08:33:24 2010 -0800
@@ -1,5 +1,5 @@
 /*
- * Copyright 1997-2010 Sun Microsystems, Inc.  All Rights Reserved.
+ * Copyright 1997-2008 Sun Microsystems, Inc.  All Rights Reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -39,7 +39,6 @@
                  Dtrace_trap = OSR_Entry,  // dtrace probes can never have an OSR entry so reuse it
                  Exceptions,     // Offset where exception handler lives
                  Deopt,          // Offset where deopt handler lives
-                 DeoptMH,        // Offset where MethodHandle deopt handler lives
                  max_Entries };
 
   // special value to note codeBlobs where profile (forte) stack walking is
@@ -52,13 +51,12 @@
 
 public:
   CodeOffsets() {
-    _values[Entry         ] = 0;
+    _values[Entry] = 0;
     _values[Verified_Entry] = 0;
     _values[Frame_Complete] = frame_never_safe;
-    _values[OSR_Entry     ] = 0;
-    _values[Exceptions    ] = -1;
-    _values[Deopt         ] = -1;
-    _values[DeoptMH       ] = -1;
+    _values[OSR_Entry] = 0;
+    _values[Exceptions] = -1;
+    _values[Deopt] = -1;
   }
 
   int value(Entries e) { return _values[e]; }
--- a/src/share/vm/c1/c1_Compilation.cpp	Fri Jan 29 12:13:05 2010 +0100
+++ b/src/share/vm/c1/c1_Compilation.cpp	Fri Jan 29 08:33:24 2010 -0800
@@ -1,5 +1,5 @@
 /*
- * Copyright 1999-2010 Sun Microsystems, Inc.  All Rights Reserved.
+ * Copyright 1999-2009 Sun Microsystems, Inc.  All Rights Reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -205,8 +205,6 @@
 void Compilation::emit_code_epilog(LIR_Assembler* assembler) {
   CHECK_BAILOUT();
 
-  CodeOffsets* code_offsets = assembler->offsets();
-
   // generate code or slow cases
   assembler->emit_slow_case_stubs();
   CHECK_BAILOUT();
@@ -215,18 +213,10 @@
   assembler->emit_exception_entries(exception_info_list());
   CHECK_BAILOUT();
 
-  // Generate code for exception handler.
-  code_offsets->set_value(CodeOffsets::Exceptions, assembler->emit_exception_handler());
+  // generate code for exception handler
+  assembler->emit_exception_handler();
   CHECK_BAILOUT();
-
-  // Generate code for deopt handler.
-  code_offsets->set_value(CodeOffsets::Deopt, assembler->emit_deopt_handler());
-  CHECK_BAILOUT();
-
-  // Generate code for MethodHandle deopt handler.  We can use the
-  // same code as for the normal deopt handler, we just need a
-  // different entry point address.
-  code_offsets->set_value(CodeOffsets::DeoptMH, assembler->emit_deopt_handler());
+  assembler->emit_deopt_handler();
   CHECK_BAILOUT();
 
   // done
--- a/src/share/vm/c1/c1_LIRAssembler.hpp	Fri Jan 29 12:13:05 2010 +0100
+++ b/src/share/vm/c1/c1_LIRAssembler.hpp	Fri Jan 29 08:33:24 2010 -0800
@@ -1,5 +1,5 @@
 /*
- * Copyright 2000-2010 Sun Microsystems, Inc.  All Rights Reserved.
+ * Copyright 2000-2008 Sun Microsystems, Inc.  All Rights Reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -133,9 +133,9 @@
   void add_call_info_here(CodeEmitInfo* info)                              { add_call_info(code_offset(), info); }
 
   // code patterns
-  int  emit_exception_handler();
+  void emit_exception_handler();
   void emit_exception_entries(ExceptionInfoList* info_list);
-  int  emit_deopt_handler();
+  void emit_deopt_handler();
 
   void emit_code(BlockList* hir);
   void emit_block(BlockBegin* block);
--- a/src/share/vm/code/nmethod.cpp	Fri Jan 29 12:13:05 2010 +0100
+++ b/src/share/vm/code/nmethod.cpp	Fri Jan 29 08:33:24 2010 -0800
@@ -1,5 +1,5 @@
 /*
- * Copyright 1997-2010 Sun Microsystems, Inc.  All Rights Reserved.
+ * Copyright 1997-2009 Sun Microsystems, Inc.  All Rights Reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -592,7 +592,6 @@
     // values something that will never match a pc like the nmethod vtable entry
     _exception_offset        = 0;
     _deoptimize_offset       = 0;
-    _deoptimize_mh_offset    = 0;
     _orig_pc_offset          = 0;
 #ifdef HAVE_DTRACE_H
     _trap_offset             = 0;
@@ -683,7 +682,6 @@
     // values something that will never match a pc like the nmethod vtable entry
     _exception_offset        = 0;
     _deoptimize_offset       = 0;
-    _deoptimize_mh_offset    = 0;
     _trap_offset             = offsets->value(CodeOffsets::Dtrace_trap);
     _orig_pc_offset          = 0;
     _stub_offset             = data_offset();
@@ -796,7 +794,6 @@
     // Exception handler and deopt handler are in the stub section
     _exception_offset        = _stub_offset + offsets->value(CodeOffsets::Exceptions);
     _deoptimize_offset       = _stub_offset + offsets->value(CodeOffsets::Deopt);
-    _deoptimize_mh_offset    = _stub_offset + offsets->value(CodeOffsets::DeoptMH);
     _consts_offset           = instructions_offset() + code_buffer->total_offset_of(code_buffer->consts()->start());
     _scopes_data_offset      = data_offset();
     _scopes_pcs_offset       = _scopes_data_offset   + round_to(debug_info->data_size         (), oopSize);
@@ -2034,21 +2031,9 @@
   guarantee(nm->_lock_count >= 0, "unmatched nmethod lock/unlock");
 }
 
-
-// -----------------------------------------------------------------------------
-// nmethod::get_deopt_original_pc
-//
-// Return the original PC for the given PC if:
-// (a) the given PC belongs to a nmethod and
-// (b) it is a deopt PC
-address nmethod::get_deopt_original_pc(const frame* fr) {
-  if (fr->cb() == NULL)  return NULL;
-
-  nmethod* nm = fr->cb()->as_nmethod_or_null();
-  if (nm != NULL && nm->is_deopt_pc(fr->pc()))
-    return nm->get_original_pc(fr);
-
-  return NULL;
+bool nmethod::is_deopt_pc(address pc) {
+  bool ret =  pc == deopt_handler_begin();
+  return ret;
 }
 
 
@@ -2419,8 +2404,6 @@
   if (block_begin == verified_entry_point())    stream->print_cr("[Verified Entry Point]");
   if (block_begin == exception_begin())         stream->print_cr("[Exception Handler]");
   if (block_begin == stub_begin())              stream->print_cr("[Stub Code]");
-  if (block_begin == deopt_handler_begin())     stream->print_cr("[Deopt Handler Code]");
-  if (block_begin == deopt_mh_handler_begin())  stream->print_cr("[Deopt MH Handler Code]");
   if (block_begin == consts_begin())            stream->print_cr("[Constants]");
   if (block_begin == entry_point()) {
     methodHandle m = method();
--- a/src/share/vm/code/nmethod.hpp	Fri Jan 29 12:13:05 2010 +0100
+++ b/src/share/vm/code/nmethod.hpp	Fri Jan 29 08:33:24 2010 -0800
@@ -1,5 +1,5 @@
 /*
- * Copyright 1997-2010 Sun Microsystems, Inc.  All Rights Reserved.
+ * Copyright 1997-2009 Sun Microsystems, Inc.  All Rights Reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -145,12 +145,8 @@
 
   // Offsets for different nmethod parts
   int _exception_offset;
-  // All deoptee's will resume execution at this location described by
-  // this offset.
+  // All deoptee's will resume execution at this location described by this offset
   int _deoptimize_offset;
-  // All deoptee's at a MethodHandle call site will resume execution
-  // at this location described by this offset.
-  int _deoptimize_mh_offset;
 #ifdef HAVE_DTRACE_H
   int _trap_offset;
 #endif // def HAVE_DTRACE_H
@@ -333,25 +329,24 @@
   bool is_compiled_by_c2() const;
 
   // boundaries for different parts
-  address code_begin            () const          { return _entry_point; }
-  address code_end              () const          { return           header_begin() + _stub_offset          ; }
-  address exception_begin       () const          { return           header_begin() + _exception_offset     ; }
-  address deopt_handler_begin   () const          { return           header_begin() + _deoptimize_offset    ; }
-  address deopt_mh_handler_begin() const          { return           header_begin() + _deoptimize_mh_offset ; }
-  address stub_begin            () const          { return           header_begin() + _stub_offset          ; }
-  address stub_end              () const          { return           header_begin() + _consts_offset        ; }
-  address consts_begin          () const          { return           header_begin() + _consts_offset        ; }
-  address consts_end            () const          { return           header_begin() + _scopes_data_offset   ; }
-  address scopes_data_begin     () const          { return           header_begin() + _scopes_data_offset   ; }
-  address scopes_data_end       () const          { return           header_begin() + _scopes_pcs_offset    ; }
-  PcDesc* scopes_pcs_begin      () const          { return (PcDesc*)(header_begin() + _scopes_pcs_offset   ); }
-  PcDesc* scopes_pcs_end        () const          { return (PcDesc*)(header_begin() + _dependencies_offset) ; }
-  address dependencies_begin    () const          { return           header_begin() + _dependencies_offset  ; }
-  address dependencies_end      () const          { return           header_begin() + _handler_table_offset ; }
-  address handler_table_begin   () const          { return           header_begin() + _handler_table_offset ; }
-  address handler_table_end     () const          { return           header_begin() + _nul_chk_table_offset ; }
-  address nul_chk_table_begin   () const          { return           header_begin() + _nul_chk_table_offset ; }
-  address nul_chk_table_end     () const          { return           header_begin() + _nmethod_end_offset   ; }
+  address code_begin         () const             { return _entry_point; }
+  address code_end           () const             { return           header_begin() + _stub_offset          ; }
+  address exception_begin    () const             { return           header_begin() + _exception_offset     ; }
+  address deopt_handler_begin() const             { return           header_begin() + _deoptimize_offset    ; }
+  address stub_begin         () const             { return           header_begin() + _stub_offset          ; }
+  address stub_end           () const             { return           header_begin() + _consts_offset        ; }
+  address consts_begin       () const             { return           header_begin() + _consts_offset        ; }
+  address consts_end         () const             { return           header_begin() + _scopes_data_offset   ; }
+  address scopes_data_begin  () const             { return           header_begin() + _scopes_data_offset   ; }
+  address scopes_data_end    () const             { return           header_begin() + _scopes_pcs_offset    ; }
+  PcDesc* scopes_pcs_begin   () const             { return (PcDesc*)(header_begin() + _scopes_pcs_offset   ); }
+  PcDesc* scopes_pcs_end     () const             { return (PcDesc*)(header_begin() + _dependencies_offset); }
+  address dependencies_begin () const             { return           header_begin() + _dependencies_offset ; }
+  address dependencies_end   () const             { return           header_begin() + _handler_table_offset ; }
+  address handler_table_begin() const             { return           header_begin() + _handler_table_offset ; }
+  address handler_table_end  () const             { return           header_begin() + _nul_chk_table_offset   ; }
+  address nul_chk_table_begin() const             { return           header_begin() + _nul_chk_table_offset ; }
+  address nul_chk_table_end  () const             { return           header_begin() + _nmethod_end_offset   ; }
 
   int code_size         () const                  { return      code_end         () -      code_begin         (); }
   int stub_size         () const                  { return      stub_end         () -      stub_begin         (); }
@@ -520,7 +515,7 @@
  private:
   ScopeDesc* scope_desc_in(address begin, address end);
 
-  address* orig_pc_addr(const frame* fr) { return (address*) ((address)fr->unextended_sp() + _orig_pc_offset); }
+  address* orig_pc_addr(const frame* fr ) { return (address*) ((address)fr->unextended_sp() + _orig_pc_offset); }
 
   PcDesc* find_pc_desc_internal(address pc, bool approximate);
 
@@ -543,17 +538,13 @@
   void copy_scopes_pcs(PcDesc* pcs, int count);
   void copy_scopes_data(address buffer, int size);
 
-  // Deopt
-  // Return true is the PC is one would expect if the frame is being deopted.
-  bool is_deopt_pc      (address pc) { return is_deopt_entry(pc) || is_deopt_mh_entry(pc); }
-  bool is_deopt_entry   (address pc) { return pc == deopt_handler_begin(); }
-  bool is_deopt_mh_entry(address pc) { return pc == deopt_mh_handler_begin(); }
+  // deopt
+  // return true is the pc is one would expect if the frame is being deopted.
+  bool is_deopt_pc(address pc);
   // Accessor/mutator for the original pc of a frame before a frame was deopted.
   address get_original_pc(const frame* fr) { return *orig_pc_addr(fr); }
   void    set_original_pc(const frame* fr, address pc) { *orig_pc_addr(fr) = pc; }
 
-  static address get_deopt_original_pc(const frame* fr);
-
   // MethodHandle
   bool is_method_handle_return(address return_pc);
 
--- a/src/share/vm/opto/output.cpp	Fri Jan 29 12:13:05 2010 +0100
+++ b/src/share/vm/opto/output.cpp	Fri Jan 29 08:33:24 2010 -0800
@@ -1,5 +1,5 @@
 /*
- * Copyright 1998-2010 Sun Microsystems, Inc.  All Rights Reserved.
+ * Copyright 1998-2009 Sun Microsystems, Inc.  All Rights Reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -1430,10 +1430,6 @@
     _code_offsets.set_value(CodeOffsets::Exceptions, emit_exception_handler(*cb));
     // Emit the deopt handler code.
     _code_offsets.set_value(CodeOffsets::Deopt, emit_deopt_handler(*cb));
-    // Emit the MethodHandle deopt handler code.  We can use the same
-    // code as for the normal deopt handler, we just need a different
-    // entry point address.
-    _code_offsets.set_value(CodeOffsets::DeoptMH, emit_deopt_handler(*cb));
   }
 
   // One last check for failed CodeBuffer::expand:
--- a/src/share/vm/runtime/deoptimization.cpp	Fri Jan 29 12:13:05 2010 +0100
+++ b/src/share/vm/runtime/deoptimization.cpp	Fri Jan 29 08:33:24 2010 -0800
@@ -1,5 +1,5 @@
 /*
- * Copyright 1997-2010 Sun Microsystems, Inc.  All Rights Reserved.
+ * Copyright 1997-2009 Sun Microsystems, Inc.  All Rights Reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -235,12 +235,6 @@
   assert(cb->frame_size() >= 0, "Unexpected frame size");
   intptr_t* unpack_sp = stub_frame.sp() + cb->frame_size();
 
-  // If the deopt call site is a MethodHandle invoke call site we have
-  // to adjust the unpack_sp.
-  nmethod* deoptee_nm = deoptee.cb()->as_nmethod_or_null();
-  if (deoptee_nm != NULL && deoptee_nm->is_method_handle_return(deoptee.pc()))
-    unpack_sp = deoptee.unextended_sp();
-
 #ifdef ASSERT
   assert(cb->is_deoptimization_stub() || cb->is_uncommon_trap_stub(), "just checking");
   Events::log("fetch unroll sp " INTPTR_FORMAT, unpack_sp);
--- a/src/share/vm/runtime/frame.cpp	Fri Jan 29 12:13:05 2010 +0100
+++ b/src/share/vm/runtime/frame.cpp	Fri Jan 29 08:33:24 2010 -0800
@@ -1,5 +1,5 @@
 /*
- * Copyright 1997-2010 Sun Microsystems, Inc.  All Rights Reserved.
+ * Copyright 1997-2009 Sun Microsystems, Inc.  All Rights Reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -107,11 +107,7 @@
 
 address frame::raw_pc() const {
   if (is_deoptimized_frame()) {
-    nmethod* nm = cb()->as_nmethod_or_null();
-    if (nm->is_method_handle_return(pc()))
-      return nm->deopt_mh_handler_begin() - pc_return_offset;
-    else
-      return nm->deopt_handler_begin() - pc_return_offset;
+    return ((nmethod*) cb())->deopt_handler_begin() - pc_return_offset;
   } else {
     return (pc() - pc_return_offset);
   }
@@ -273,16 +269,10 @@
   } // NeedsDeoptSuspend
 
 
-  // If the call site is a MethodHandle call site use the MH deopt
-  // handler.
-  address deopt = nm->is_method_handle_return(pc()) ?
-    nm->deopt_mh_handler_begin() :
-    nm->deopt_handler_begin();
-
+  address deopt = nm->deopt_handler_begin();
   // Save the original pc before we patch in the new one
   nm->set_original_pc(this, pc());
   patch_pc(thread, deopt);
-
 #ifdef ASSERT
   {
     RegisterMap map(thread, false);
@@ -311,29 +301,6 @@
   return result;
 }
 
-
-//------------------------------------------------------------------------------
-// frame::verify_deopt_original_pc
-//
-// Verifies the calculated original PC of a deoptimization PC for the
-// given unextended SP.  The unextended SP might also be the saved SP
-// for MethodHandle call sites.
-#if ASSERT
-void frame::verify_deopt_original_pc(nmethod* nm, intptr_t* unextended_sp, bool is_method_handle_return) {
-  frame fr;
-
-  // This is ugly but it's better than to change {get,set}_original_pc
-  // to take an SP value as argument.  And it's only a debugging
-  // method anyway.
-  fr._unextended_sp = unextended_sp;
-
-  address original_pc = nm->get_original_pc(&fr);
-  assert(nm->code_contains(original_pc), "original PC must be in nmethod");
-  assert(nm->is_method_handle_return(original_pc) == is_method_handle_return, "must be");
-}
-#endif
-
-
 // Note: called by profiler - NOT for current thread
 frame frame::profile_find_Java_sender_frame(JavaThread *thread) {
 // If we don't recognize this frame, walk back up the stack until we do
--- a/src/share/vm/runtime/frame.hpp	Fri Jan 29 12:13:05 2010 +0100
+++ b/src/share/vm/runtime/frame.hpp	Fri Jan 29 08:33:24 2010 -0800
@@ -1,5 +1,5 @@
 /*
- * Copyright 1997-2010 Sun Microsystems, Inc.  All Rights Reserved.
+ * Copyright 1997-2009 Sun Microsystems, Inc.  All Rights Reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -141,14 +141,6 @@
   frame sender_for_interpreter_frame(RegisterMap* map) const;
   frame sender_for_native_frame(RegisterMap* map) const;
 
-#if ASSERT
-  // Used in frame::sender_for_{interpreter,compiled}_frame
-  static void verify_deopt_original_pc(   nmethod* nm, intptr_t* unextended_sp, bool is_method_handle_return = false);
-  static void verify_deopt_mh_original_pc(nmethod* nm, intptr_t* unextended_sp) {
-    verify_deopt_original_pc(nm, unextended_sp, true);
-  }
-#endif
-
   // All frames:
 
   // A low-level interface for vframes:
--- a/src/share/vm/runtime/sharedRuntime.cpp	Fri Jan 29 12:13:05 2010 +0100
+++ b/src/share/vm/runtime/sharedRuntime.cpp	Fri Jan 29 08:33:24 2010 -0800
@@ -1033,20 +1033,10 @@
   address   sender_pc = caller_frame.pc();
   CodeBlob* sender_cb = caller_frame.cb();
   nmethod*  sender_nm = sender_cb->as_nmethod_or_null();
-  bool is_mh_invoke_via_adapter = false;  // Direct c2c call or via adapter?
-  if (sender_nm != NULL && sender_nm->is_method_handle_return(sender_pc)) {
-    // If the callee_target is set, then we have come here via an i2c
-    // adapter.
-    methodOop callee = thread->callee_target();
-    if (callee != NULL) {
-      assert(callee->is_method(), "sanity");
-      is_mh_invoke_via_adapter = true;
-    }
-  }
 
   if (caller_frame.is_interpreted_frame() ||
-      caller_frame.is_entry_frame()       ||
-      is_mh_invoke_via_adapter) {
+      caller_frame.is_entry_frame() ||
+      (sender_nm != NULL && sender_nm->is_method_handle_return(sender_pc))) {
     methodOop callee = thread->callee_target();
     guarantee(callee != NULL && callee->is_method(), "bad handshake");
     thread->set_vm_result(callee);
@@ -1427,7 +1417,7 @@
         if (callee == cb || callee->is_adapter_blob()) {
           // static call or optimized virtual
           if (TraceCallFixup) {
-            tty->print("fixup callsite           at " INTPTR_FORMAT " to compiled code for", caller_pc);
+            tty->print("fixup callsite at " INTPTR_FORMAT " to compiled code for", caller_pc);
             moop->print_short_name(tty);
             tty->print_cr(" to " INTPTR_FORMAT, entry_point);
           }
@@ -1443,7 +1433,7 @@
         }
       } else {
           if (TraceCallFixup) {
-            tty->print("already patched callsite at " INTPTR_FORMAT " to compiled code for", caller_pc);
+            tty->print("already patched  callsite at " INTPTR_FORMAT " to compiled code for", caller_pc);
             moop->print_short_name(tty);
             tty->print_cr(" to " INTPTR_FORMAT, entry_point);
           }